Menoceras fossil map
Where fossils of Menoceras have been found, shown on the Earth as it looked about 15 million years ago and on today’s map.
Dots are fossil collections recorded in the Paleobiology Database. The “then” view moves today’s fossil sites back to their positions 15 million years ago (the time slice nearest the median age of the fossils) using the Merdith et al. (2021) plate model; positions are approximate. Open on the timeline map →

| Group | Early mammals |
|---|---|
| Lived | 29.5–5.333 million years ago (Rupelian to Messinian) |
| Periods | Paleogene, Neogene |
| Family | Rhinocerotidae |
| Named by | (Troxell 1921) |
| Fossil records | 114 occurrences at 30 locations (PBDB) |
| Found in | United States, Panama, Mexico |
| Rock formations | txn:43187, Marsland, Runningwater, Harrison, Oakville, Zia Sand |
About Menoceras
Menoceras ("Crescent Horns") is a genus of extinct, small rhinocerotids endemic to most of southern North America and ranged as far south as Panama during the early Miocene epoch. It lived from around 23.1-12.5 Ma, existing for approximately 10.6 million years.
Text in “About” is quoted from the Wikipedia article Menoceras (revision 1332501468), licensed under CC BY-SA 4.0; introduction excerpted verbatim, formatting removed. Ages, family, authority and fossil records: Paleobiology Database, accessed 23 October 2026. Ages are those of the rock layers the fossils were found in. Wikidata: Q135708.